Gas and air mixer



2 Sheets-Sheet 2.

(No Model.)

HQJ. BELL.

GAS AND lAIB. MIXER.

Patented Mar. 26, 1889.

N. Pinus. Pnulvumngnpw, www u. c.

lUNITED STATES PATENT OFFICE.

HAROLD J. BELL, OE GLOUCESTER CITY, NEV JERSEY, ASSIGNOR TO THE VELSBACH INCANDESCENT GAS LIGHT COMPANY, OF NEW JERSEY.

GAS AND AIR MIXER.

'SECIF-ICATION forming part of Letters Patent No. 400,175, dated March 26, 1889-.

Application l'ed September 6, 1888. Serial No. 284,721. (No model.) l

To' ct-'ZZ when?, it may concern.-

Be it known that l, HAROLD J. BELL, a citizen of the United States, residing at Gloucester City, in the county of Camden and State of New Jersey, have invented new and useful lmprovements in Gas and Air Mixing Machines, of which the following is a specification.

This invention relates to machines for mixing gas or carbureted air or vapor and unearro bureted atmospheric air, and has for its object a mixer in which the density of coal-gas, gasoline, hydrocarbon, naphtha, or other carbureted vapor or carbnreted air can be regulated by the admixture therewith of uncarbureted atmospheric air in suitable proportions to produce a gas of the desired quality, and to automatically control or reduce the pressure of the gas or carbureted air or vapor and atmospheric air which are delivered to it zo at the same time and under the same pressure.

The invention consists in t-he combinations of devices which will be hereinafter particularly described, and then pointed out in the 2 5 claims.

In the annexed drawings, illustrating the invention, Figure 1 is a Vertical central section of my improved gas and air mixer. Fig. 2 is a plan of the same with the top of the gasholder and part of the valve removed. Fig. 3 is a vertical transverse section of the gas and air inlet pipes and valves and adjacent parts onv the line x so of Fig. 1.

The numeral 1 designates an open-top wa- 3 5 ter-tank of cylindrical form. As shown, the

bottom 2 of this tank is preferably raised some distance above the supporting-base 3 o the tank.

To the center of the tank-bottom 2 is secured a vertical tube, 4, which projects above the tank, as shown. The tube 4 is fastened in place by means of a nut, 5, immediately above the tank-bottom and a screw-cap, 6, beneath, washers 7 being placed around the tube,

as shown, the object being to make a close joint to prevent the leakage of water around the tube or the escapeo-f gas through it. This vertical tube 4 serves as a guideway for a guide-rod, 8, that is connected with Ythe gas- 5o holder 9, which is located in the tank. The upper end of the guide-rod 8 is screwed into 19 are connected.

a cylindrical block, lO, the 'upper end of which is in contact with the under side of the gasholder top, and the latter is centrally perforated for the passage of a shouldered stem or rod, 11, by which said block and gas-holder top are securely connected. The stem or rod 11 also serves as a place of attachment for annular weights, by which the pressure of the gas in the holder can be adjusted. The cy- 6o lindrical block 10 is provided with a slot, 12, to receive the end of a lever, 13, which also passes through corresponding slots 14 in the tube 4, the slots 14 being of such length as to allow a suitable play for the lever 13 during 65 the rise and fall .of the gasholder and its guide-rod. The lever 13 is fulcrumed on a transverse rod, 15, supported in lugs 16, projecting from a chaxnbered block, 17, with which the gas-inlet pipe 18 and air-inlet pipe 7o The lever 13 is pivotally connected with lugs 2O on the top of a valve, 21, which also has a hinged or pivotal connection, by means of lugs 22, with the transverse rod 15, on which the lever 13 is ful- 75 crumed.

Beneath the hinged valve 21 is a slide-valve,

23, having a port, 24, that can be brought into line with the chamber 25, with which the gasinlet pipe 18 communicates, and a port, 26, 8o that can be brought into line with the chamber 27, with which the air-inlet pipe 19 communicates. The slide-valve 23 is operated through an eccentric, 28, on the upper end of a vertical rod or rock-shaft, 29, by means oi a hand-lever, 30, on the lower end of said rod or rock-shaft beneath the bottom of the watertank, the base of w-hich is provided with a slot, 31, through which the hand-lever projects.

A stung-box, 32,is provided around the rod 9o' or rock-shaft 29 where it passes through the bottom of the water-tank. The gas and air inlet pipes 18 and 19 are surrounded by nuts 33 and washers 34 where they pass through the tank bottom. The slide valve 23 is 95 adapted to be moved in the grooved or rabbeted upper surface of the chambered block 17, and is held down to its seat bymeans ot a headed pin, 35, working in a slot, 36, in a well-known manner.

On the hand-lever 30 is an index-nger, 37, which coacts with a scale-plate, 38, that is at- IOO tached to the outside of the Water-tank, to indicate the relative proportions of gas and air admitted to the machine.

By throwing the handdever to the right or left, as required, the proportionate quantity oi gas or air can be increased or diminished, or the supply of either can be entirely cut off for a time, so as to produce a mixture of the proper density and desired photometric quality. It will be seen that the gas and air inlets are alike in construction.

The pressure of the gas-miXture in the holder is determined by the height of the Water in the tank and the Weight of the holder, which can be increased or diminished by placing additional Weights around the stem l1 or by removing the said Weights, as required. \Vithn certain limits the pressure is automatically controlled bythe rise and fall otl the gas-holder actuating the hinged valve '2l through the intermediate lever-connections.

The gas-mixture is discharged from the machine through a delivery-pipe, 3l), secured in the bottom of the Water-tank, through which it passes by means of nuts and Washers 4l, as shown. Iirom this delivery-pipe the gas is conveyed by suitable means to the place W here it is to be used.

The gas-inlet pipe 1S is supplied from any suitable carburetor or source of earbureted air or vapor or of coal-gas, and the air-inlet pipe l 9 is supplied with air under the same pressure by a suitable pump; but as these 'form no part of my invention and are Well knownit is not deemed necessary to illustrate them in connection with the gas and air mixer.

That- I claim as my invention is l. In a gas and air mixing machine, the combination, with a water-tank, a gas-holder resting in said tank, and gas and air inlet pipes and a delivery-pipe located in said tank and holder, of a chambered block located upon and communicating with said inlet-pipes, a hinged valve adapted to control the admission of gas or vapor and air through the inlet-pipes i and chambered block to the holder, a transverse rod on which said valve is hinged, and L a lever ulcrumed on said rod and connected With said valve and gas-holder, whereby the valve is closed and opened by the rise and fall of the holder, substantially as described.

2. In a gas and air mixing machine, the combination of a Water-tank, a gas-holder resting in said tank, gas and air inlet pipes and ade li very-pipe located in said tank and holder, a chambered block communicatingwith said gas and air inlet pipes, a slide-valve adapted to control the relative proportions of gas and air admitted through said inlet-pi pes, a rock-sh aft provided at one end with an eccentric that connects with said slideyalve, a hand-lever on the other end of said rock-shaft, an index and scale adapt-ed to indicate the relative proportions of gas or vapor and air admitted into the machine by the setting of the hand-lever, and a valve having lever-connections with the gas-holder, whereby said valve is closed and opened by the rise and fall ot' the holder, substantially as described.

3. In a gas and air mixing machine, the combination of a \vatertank having a central vcrtically-slotted guide-tube open at its top and closed at its bottom, a gas-holder resting in the tank and having a central guide engaged in said tube, gas and air inlet pipes and a delivery-pipe located in the tank and holder, a chambered block communicating with said inlet-pipes, a slide-valve seated in said block and adapted to control the proportionate quantities of gas or vapor and air admitted into the machine, means, substantially as described, for operating the said slide-valve, a hinged valve seated above the slid e-valve and adapted to control the admission of gas and air into the holder, and a lever connecting said hinged valve with the holder, whereby said valve is closed and opened by the rise and fall of the holder, substantially as described.

In testimony whereof I afx my signature in presence ot' two witnesses.

Il. J'. BELL.

Witnesses:

HARRY BANcRoFT, (inns. l). WASHBURN. 

